Looks at the unique conditions that exist on Earth that make it an ideal place for life to flourish, discussing water, energy, and the atmosphere, and examines other moons and planets that have the four most important elements needed for life.
Combines text with diagrams, maps, charts, and photographs to explore water power; discussing how it is processed, where it is available, and the environmental consequences of using it. Includes a glossary and a list of resources.
Combines text with diagrams, maps, charts, and photographs to explore hydrogen fuel; discussing how it is processed, where it is available, and the environmental consequences of using it. Includes a glossary and a list of resources.
Combines text with diagrams, maps, charts, and photographs to explore fossil fuels; discussing how they are processed, where they are available, and the environmental consequences of using them. Includes a glossary and a list of resources.
Presents a short study of how levers, wheels and axles, pulleys, inclined planes, wedges, and screws work, and the importance of these principles in various machines.
A detailed description of black holes, quasars, and stars along with hands-on experiments and observations and full-color photographs taken by telescopes on Earth and in space.
